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b=TWrY/0Yi1wrIkj+Ia8H5X2wEDClTENL0qfEm1jAFrTuJb+i/k7eUa+cPxl+d3mwRg kNKQhrLnR3yR1BXYU8IijcyFmwDfqrfWkez3R9/9dJ3ZigDoY+rAk9QmJIxMc3Levb SHJ/Gxenirvmi0eQZDa4wJSXavgzsw9jFxuy4mvR4lwBJwx9X1FEpiZnzRGAVBZZjA vZSKhP4/aAbp3PxhPnzodL6LqY4kN4Ft1LcdggEFi7yQWc8sJZoBh2Vbndn47H4niE nfg+D00kPBF6IbiNqzQa6R/42kW+qQOydZQbd+vkAP0mVco05lVkYnHBD0nVaHTRqY JRrXTTvBNQ+zg== Message-ID: Date: Thu, 26 Feb 2026 18:04:04 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/4] mm/page_table_check: Pass mm_struct to pxx_user_accessible_page() To: Alexander Gordeev , Pasha Tatashin , Andrew Morton Cc: linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org References: <68c2f6df2955033cbf1ccbd2b5c2816e72ac345c.1771845678.git.agordeev@linux.ibm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <68c2f6df2955033cbf1ccbd2b5c2816e72ac345c.1771845678.git.agordeev@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 74A124001F X-Stat-Signature: xe9w7pxp8ihx1py5bwewnpw1ptp6mcqb X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1772125451-914006 X-HE-Meta: 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 6uBLlFLj GeOkk1RT1jB7TtovEFLwFsAoHCNZ21mZ31I+DcehshGSsSCatVixKrvD63XXNfZpO2UnlY3afcQ4DSnbhQPtxx6w0elAdkn7iitk1nEBGIKaBLXD2MFkETuVMqzw/aIWBWx/P0E7XXKTzPzqdVuTiq0TPMYxZjhOraKYqwkHIZQRb3Y/FCT1Z4MB6HneSDKLWFonyuo3/258Pa5M9YTBXRUZ70+7OejkAO9JVlGqeYIT8NvDqhAcHd4ayQRHcZWNgU6EiCArZvewq7J62eK6xHy/pkFJK48Ji5M+jxB0rXHhKX4Swlvlm4G6RKR9C7oiJbFH7NevulsBImAQO+aQ9DFvDpZKHzwtLEYZq Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2/23/26 12:53, Alexander Gordeev wrote: > From: Tobias Huschle > > Unlike other architectures, s390 does not have means to > distinguish kernel vs user page table entries - neither > an entry itself, nor the address could be used for that. > It is only the mm_struct that indicates whether an entry > in question is mapped to a user space. So pass mm_struct > to pxx_user_accessible_page() callbacks. > > [agordeev@linux.ibm.com: rephrased commit message, removed braces] > > Reviewed-by: Gerald Schaefer > Signed-off-by: Tobias Huschle > Signed-off-by: Alexander Gordeev > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David